Big Sister & Little Brother (partially found English dub of "Storasyster & Lillebror" animated series; 1997)
From The Lost Media Wiki
Storasyster och Lillebror is a 1997 Swedish animated children's television series created by Wegelius Animation based on the series of children's books of the same name by Anders Jacobsson and Sören Olsson. An English dub under the name Big Sister, Little Brother aired as part of Mister Moose's Fun Time in 1998, and later on PBS Kids Sprout between 2005 and 2009.
Availability
Although the entire series is available in the original Swedish language, only six full episodes of the English dub have surfaced one of which being seen on the Mister Moose's Fun Time episode Moosecar Races Day, and there are no known home media releases of it. It's also unknown how many episodes of the show were dubbed.